JQ实现点击后手机验证码倒计时代码

JQ实现点击后手机验证码倒计时代码

<script type="text/javascript">
                        //点击后进入倒计时
                        $(document).ready(function(){
                            //JQ自定义一个函数
                            $.extend({
                                "setTimeA":function(b) {
                                    if(parseInt(b)>1) {
                                        var timeStart = parseInt(b) - 1;
                                        $("#verification_btn").text(timeStart);
                                        setTimeout(function(){$.setTimeA(timeStart);},1000);
                                    }else{
                                        $("#verification_btn").removeAttr("disabled").attr(
                                            "class", "sub"
                                        ).text("验证");
                                    }

                            }
                        });

                            $("#verification_btn").click(function(){
                                //变为不能选择
                                $("#verification_btn").removeAttr(
                                    "class"
                                ).attr("disabled","disabled");
                                //调用上面自定义的函数
                                $.setTimeA(60);
                            });
                        });
                    script>